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All Journal Reaktor Jurnal Sains dan Teknologi Mechatronics, Electrical Power, and Vehicular Technology Jurnal Sains Materi Indonesia Jurnal Sains dan Teknologi Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Indonesian Journal of Tropical and Infectious Disease Elkawnie Konversi Journal Of Chemical Process Engineering (JCPE) Indonesian Journal of Chemistry Communications in Science and Technology Jurnal Crystal : Publikasi Penelitian Kimia dan Terapannya Teknomekanik Unri Conference Series: Community Engagement Journal of Applied Materials and Technology Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability SAINSTEK Estungkara: Jurnal Pengabdian Pendidikan Sejarah International Journal of Renewable Energy Development Journal Of Chemical Process Engineering JURNAL REKAYASA KIMIA & LINGKUNGAN Journal of Engineering and Technological Sciences Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Amun Amri
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Nursing Public Health Social Sciences Other

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Strategi Reseller dalam Meningkatkan Penjualan Produk Pengkilap Mobil/Motor yang Diproduksi oleh Inkubator Bisnis Graphene Guard di Universitas Riau Amri, Amun; Reni Yenti, Silvia; Heltina, Desi; Herman, Syamsu; Aziz, Azridjal; Nadhifah, Evi; Ekwarso, Hendro
Estungkara: Jurnal Pengabdian Pendidikan Sejarah Vol. 2 No. 2 (2023): Jurnal Pengabdian Masyarakat
Publisher : Pendidikan Sejarah FKIP Universitas JAMBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/est.v2i2.29149

Abstract

Efforts to increase sales of car/motorcycle polish products have been carried out by the Graphene Guard business incubator. This product is a downstream research result of lecturer/researcher at the Faculty of Engineering, Riau University. As a new product and not yet known to the public, special strategies are needed to increase sales. In the initial stage, an online and offline sales strategy was carried out, but apparently it did not show encouraging results even though promotions had been carried out. It was felt that a reseller strategy needed to be implemented. The reseller strategy, especially offline resellers, was addressed to the students at Riau University with attractive prices and bonuses. This strategy generated significant sales in a relatively short time. The phenomenon where offline reseller sales results were very different from conventional sales strategies reflecting the changes in consumer behavior and increasingly complex market dynamics. Reseller marketing strategies, especially when carried out by individuals or small groups, often conveyed a strong sense of personalization and trust. In this strategy, focus was given to product advantages, customer testimonials, and real interactions. This created high levels of trust in consumers, and allowed them to feel confident in purchasing the product. This strategy can be a valuable experience for marketing of new products.
Hydrocarbon-Impacted Soils Supported Mn for Organic Pollutant Oxidation Saputra, Edy; Fadli, Ahmad; Prawiranegara, Barata Aditya; Amri, Amun; Heltina, Desi; Bahri, Syaiful; Sandhyavitri, Ari; Restuhadi, Fajar; Abid, Hussein Rasool; Azhar, Muhammad Rizwan; Utama, Panca Setia
Journal of Applied Materials and Technology Vol. 4 No. 2 (2023): March 2023
Publisher : Faculty of Engineering Universitas Riau and Applied Materials and Technology Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.4.2.90-98

Abstract

Hydrocarbon-impeded soil (HIS) is solid waste from spills or leaks during industrial activities that negatively impact the environment. This study aims to utilize HIS as catalyst support on MnO2 to degrade RhB (RhB) solution using Peroxymonosulfate (PMS) and to determine the optimum conditions for the catalyst to degrade RhB. The catalyst was synthesized by reacting HIS, calcined with KMnO4 with various catalyst supports with high and low Total contain Petroleum Hydrocarbon (TPH). The process degradation of Rhodamine Solution was carried out with various catalysts, PMS, and RhB concentrations. The catalyst was characterized using X-ray diffraction (XRD), Nitrogen gas adsorption-desorption (BET), and Scanning Electron Microscope-Energy Disperse Spectroscope (SEM-EDX). In this study,  the best catalyst performance was MnO2@H-TPH, which could activate PMS to degrade RhB with dye removal of 98% in about 180 min, at conditions 10 g/L RhB, 0.1 g/L catalyst, and 3 g/L PMS with the activation energy of 16.3 kJ/mol.
Metal-Free Activated Carbon Catalytic for Degradation of Organic Contaminants by Peroxydisulfate Activation Prawiranegara, Barata Aditya; Setia Utama, Panca; Amri, Amun; Nurhayati; Muhdarina; Awaluddin, Amir; Saputra, Edy
Journal of Applied Materials and Technology Vol. 5 No. 1 (2023): September 2023
Publisher : Faculty of Engineering Universitas Riau and Applied Materials and Technology Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/Jamt.5.1.20-26

Abstract

Green chemistry has become trending recently, and the discovery of environmentally friendly catalysts is mandatory. Activated carbons (ACs) are one of the most environmentally friendly yet cheap materials that have the potential for catalyst application. Three commercially available ACs from Pancasari, Norit, and Chemical Supply were used as metal-free catalysts for advanced oxidation process (AOP) phenol removal in water in the presence of oxidants peroxydisulfate (PDS), and hydrogen peroxide (H2O2). It was found that ACs were effective to be used as catalysts for activating those oxidants to oxidize phenol in AOP reactions. In this study, the surface area of the catalyst significantly improved the phenol removal efficiency. ACs Pancasari (ACP) with the highest surface area has the best degradation performance of phenol removal with up to 99% removal efficiency in 60 minutes under the condition of [phenol] = 30 mg L-1, [ACP] = 0.2 g L-1, [PDS] = 3.3 mmol L-1, and T = 25oC. it was also found that the degradation process was significantly influenced by reaction temperature. Nevertheless, in this study, ACs display the potential as catalysts in the AOP process for wastewater treatments.
Manufacturing of high brightness dissolving pulp from sansevieria-trifasciata fiber by effective sequences processes Yusnimar; Evelyn; Aman, Azka; Chairul; Rahmadahana, Suci; Amri, Amun
Communications in Science and Technology Vol 7 No 1 (2022)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.7.1.2022.681

Abstract

The need of dissolving pulp (DP) for rayon fiber production is increasing rapidly in recent years. Sustainable sources of DP raw materials and an effective manufacturing process are urgently required. This study aims to manufacture dissolving pulp (DP) with high brightness from Sansevieria-trifasciata (ST) fiber through the pre-hydrolysis, soda-Anthraquinone (Soda-AQ) cooking, and chlorine-free bleaching processes. The cellulose content, kappa number, pulp yield, and viscosity were analyzed. The results showed that the ?-cellulose content in ST raw material (39.43%) was relatively similar to the ?-cellulose content in Acacia pulping kraft (39.2%). Furthermore, the variations in pre-hydrolysis time affected the Kappa number, pulp yield, and viscosity. The DP obtained by the elementary chlorine-free (ECF) bleaching process had a viscosity of 9.3 cP, ?-cellulose content of 97.7%, and the brightness of 90.1% which was higher than the ISO standard of pulp brightness. The high DP brightness obtained from this unique combination of pre-hydrolysis, soda-AQ cooking and chlorine-free bleaching sequences has great potential for further development, as it can be used in viscose rayon staple fibers production.
Kesetimbangan Cair-Cair Sistem Polipropilena Dan Maleated Natural Rubber Martani, Russita; Bahruddin, Bahruddin; Amri, Amun
Journal of Chemical Process Engineering Vol. 4 No. 2 (2019): Journal of Chemical Process Engineering
Publisher : Fakultas Teknologi Industri - Universitas Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33536/jcpe.v4i2.844

Abstract

Pada campuran polipropilena (PP)-maleated natural rubber (MNR), MNR berfungsi sebagai compatibilizer yang melakukan modifikasi terhadap permukaan matrik PP untuk memudahkan masuknya filler sehingga dihasilkan campuran yang lebih kompatibel. Tujuan dari penelitian ini adalah untuk menentukan kemampuan campur maleated natural rubber (MNR) dalam polipropilena (PP) pada berbagai variasi suhu. Penelitian diawali dengan prediksi kesetimbangan cair-cair sistem PP-MNR dengan menggunakan metode UNIFAC dilanjutkan dengan validasi model kesetimbangan. Validasi model kesetimbangan cair-cair sistem PP-MNR diawali dengan mencampurkan karet alam dan maleic anhydride (MAH) dalam internal mixer untuk penyiapan MNR. MNR yang telah disiapkan lalu dicampurkan dengan PP dalam internal mixer dengan kadar MNR dan temperatur proses divariasi berdasarkan prediksi kesetimbangan cair-cair UNIFAC. Kemudian campuran PP-MNR dianalisa dengan uji difference scanning calorimetry (DSC). Hasil uji DSC digunakan untuk melakukan validasi hasil perhitungan kesetimbangan cair-cair UNIFAC. Hasil perhitungan UNIFAC merupakan kesetimbangan cair-cair sistem PP-MNR berupa kadar MNR dan temperatur proses pencampuran. Pada campuran ini MNR berfungsi sebagai compatibilizer. Kadar MNR pada campuran adalah 4,4%–11,16% dan temperatur proses adalah 170oC–210oC. Semakin besar kadar MNR dalam campuran, semakin rendah suhu proses pencampuran. Hasil validasi uji DSC sesuai dengan prediksi kesetimbangan cair-cair sistem PP-MNR menggunakan metode UNIFAC
Analisa Filler Nanomicro Graphene pada Campuran Beton dengan Variasi Faktor Air Semen Shalahuddin, Muhammad; Novan, Andre; Gussyafri, Gussyafri; Fakhri, Fakhri; Amri, Amun
SAINSTEK Vol. 12 No. 1 (2024)
Publisher : Sekolah Tinggi Teknologi Pekanbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35583/js.v12i1.252

Abstract

Kebutuhan material modern memerlukan komponen struktural dengan ketahanan dan kekuatan yang lebih baik. Informasi karakteristik beton lanjutan ini untuk mengetahui pengaruh penggunaan variasi few layer graphene dengan metode high-shear liquid exfoliation pada campuran beton. Preliminary penelitian pada mortal dilakukan dengan variasi graphene 2,5%; 5%; 7,5%; 10%; 12,5% dan 15% sebagai referensi awal dan hipotesa. Selanjutnya dengan referensi awal, dilakukan campuran beton dengan variasi graphene 2.5%, 5%, 7,5% dan 10% dengan spesimen beton ukuran 15 cm x 15 cm x 15 cm dan pengujian dilakukan setelah usia usia 28 hari. Kuat tekan maksimum terjadi pada penambahan graphene 5%, nilai kuat tekan lebih 36,31% dibandingkan beton tanpa graphene, nanomicro graphene tidak mempengaruhi berat isi beton juga tidak mempengaruhi kepadatan beton serta tidak mempengaruhi slump beton.
Review: Komposit rGO-TiO2 dalam Proses Fotokatalisis untuk Menghilangkan Kontaminan Warna pada Air Fitri, Lara Ismano; Heltina, Desi; Amri, Amun
Journal of Bioprocess, Chemical and Environmental Engineering Science Vol 5 No 2 (2024): Journal of Bioprocess, Chemical, and Environmental Engineering
Publisher : Department of Chemical Engineering, Faculty of Engineering, UNRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jbchees.5.2.46-59

Abstract

This article explains various synthesis methods for rGO-TiO2 materials and their applications in colored wastewater treatment. The methods discussed include hydrothermal, sol-gel, ultrasonication, wet impregnation, electrospinning, and electrophoresis. Each method has its own advantages: the hydrothermal and sol-gel methods enhance photocatalytic activity through the integration of TiO2 and rGO; ultrasonication and wet impregnation methods are effective in uniquely improving photocatalytic performance; while electrophoresis (EPD) and electrospinning methods excel in forming high-quality coatings and nanofibers that boost photocatalytic activity. The choice of method depends on the specific application and desired material properties. The hydrothermal and sol-gel methods are well-suited for photocatalytic applications, while EPD and electrospinning methods are superior for other applications, such as improving photovoltaic performance.
Enhancing dissolving pulp quality of mixed raw materials through pre-hydrolysis kraft-cooking: A study on Acacia crassicarpa and Terminalia catappa Sahan, Yusnimar; Rahmi, Sri Wahdini; Evelyn; Herman, Syamsu; Chairul; Khairat; Ohi, Hiroshi; Amri, Amun
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1519

Abstract

Acacia crassicarpa wood is widely used in Indonesia as a raw material for dissolving pulp (DP) by the kraft-cooking process. Given that Indonesia has a rich variety and abundance of cellulose-rich wood, it is deemed crucial to research alternative raw materials, such as Terminalia catappa wood. As an alternative source of raw material, Terminalia catappa possesses excellent adaptability to various environmental conditions and is easy to grow everywhere. The current research sought to produce DP using the mixtures of materials from these two plant species as raw materials by pre-hydrolysis, kraft-cooking, and Elementary Chlorine Free (ECF) bleaching. The DP produced had ISO brightness > 88%, alpha-cellulose content > 94%, viscosity > 6.2 cP, and pentosan content of 2.54%. The DP quality traits have met the SNI 938:2017 standards for rayon-grade pulp. Acacia Crassicarpa and Terminalia Catappa are the prospective wood mixture for producing high-quality dissolving pulp via the kraft-cooking process.
The conversion of nata de coco bacterial cellulose into cellulose nanofibers using high shear mixer with eco-friendly fluid dynamics method Amri, Amun; Putri, Diana Eka; Febryza, Dhina; Voadi, Salsabilla Diva; Utami, Syelvia Putri; Miran, Hussein A.; Rahman, M. Mahbubur
Teknomekanik Vol. 7 No. 2 (2024): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/teknomekanik.v7i2.32972

Abstract

Nanocellulose is widely applied in various fields due to its superior characteristics. Several methods have been developed to synthesize it, but they still have limitedness as being non-eco-friendly and inefficient use. Therefore, the synthesis of nanocellulose from sustainable sources is being developed using a simple and eco-friendly method. This study successfully produced a low viscosity gel suspension of cellulose nanofibers (CNF) from bacterial cellulose (BC) derived from Nata de Coco using a high shear mixer (HSM). The mixture of BC and water in a 1:1 ratio was processed with various rotational speeds and times in the HSM. The suspension result was characterized using an Ostwald viscometer, UV-vis spectrophotometer, lux meter, scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), particle size analyzer (PSA), and x-ray diffraction (XRD). Based on the characterization, it was confirmed that higher rotational speeds and extended processing times reduced the suspension viscosity and increased light transmittance, indicating a reduction in BC size to the submicron/nanometer scale. The best light transmittance was achieved with the HSM at 4500 rpm for 180 min, resulting in a viscosity drop from 232.67 mPa.s to 1.45 mPa.s. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis showed that the CNF retained its fibrous structure with nanometer-scale widths and high porosity without significant changes in crystallinity.
Electronic Textile from Lyocell and Very Few Layer Graphene: Studies and Review Aminati, Ikha Setya; Amri, Amun; Amri, Evelyn
Journal of Bioprocess, Chemical and Environmental Engineering Science Vol 3 No 1 (2022): Journal of Bioprocess, Chemical and Environmental Engineering
Publisher : Department of Chemical Engineering, Faculty of Engineering, UNRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jbchees.3.1.30-39

Abstract

Electronic textiles (e-textiles) are generally made by coating fabrics with conductive particles to impart conductive and electromagnetic properties to textile fibers and filaments. E-textile can be made by several methods, such as "dip and dry", pad-dry, screen-printing, or injeksi printing. Lyocell is the latest generation of cellulose fibers that are used as textile raw materials. Lyocell has naturally hyperhydrophilic properties and greater moisture absorption. Then, graphene is a nanomaterial composed of carbon atoms with a hexagonal structure, it has a very high conductivity value, reaching 104 S/cm. Graphene can be produced in several forms, such as very few layer graphene (VFLG). This paper aims to improve understanding of the research and review of electronic textiles created by combining lyocell textile with very few layer graphene (VFLG). This composition can enable the formation of sustainable electronic textile composites.
Co-Authors AA Sudharmawan, AA Abda Abda Abdul Rasyid Amrin Abid, Hussein Rasool Achmad Noerkhaerin Putra Adrianto Ahmad Affandi Affandi Agustina Dumaria Agustina Dumaria Ahmad Fadli Ahmad Fadli Ahmad Faisal Islamudin Aisyah Dewi Ranti, Aisyah Dewi Alfarizi, Cory Dian Alfatlian Alfatlian Ali Novia Altarawneh, Mohammednoor Aman Aman Aman, Azka Aminati, Ikha Setya Amir Awaluddin Amri, Evelyn Andrizal Andrizal Ani Suryani Annisa Rahmat Apriadi Rio Ari Sandhyavitri Arisman Adnan Assylzhan, Mazhibayev Azhar, Muhammad Rizwan Azhari Harahap Azridjal Aziz Bahri, Ahmad Syaiful Bahruddin Bahruddin Benny Ahmadi Bona Tua Chairul Chairul Chairul Chun-Chen Yang Damayanti, Elok Danil Yoselino Deden Saprudin Dedeng Hermoyo Derry Hanriansyah Pratama Desi Heltina Dhina Febryza Dhini Octavianty Diana Eka Putri Dimas Nofriyan Dwi Setyo Pambudi, Yoyok Ekawati, Lestari Elmira Rofida Alhaq Elmira, Kambarova Erliza Hambali Esty Octiana Sari Esty Octiana Sari Eva Rantika Evelyn Evelyn Evelyn Evelyn Evi Nadhifah Fabryza, Dhina Fadrian Oktori Fajar Restuhadi Fajrina Qaishum Fakhri, Fakhri Fauziyah, Hidayatul Febri Riandi Febrizal Ujang Febryza, Dhina Feby Pratama Nugraha Fesya Putri, Andini Firman syah Fitri, Lara Ismano Fransiska Maria Aprihapsari Fri Murdiya Fri Murdiya, Fri Gilang Fathurrahman Gilda Miranda Gussyafri Hasnul Bustaman Hawa, Karfika Ainil Hawa, Karfika Ainil Hendri, Yola Bertilsya Hendro Ekwarso Heni Sugesti Heri Rahmana Hussein A. Miran Indra Yasri Inten Firdhausi Wardhani Irfan Sarhadi Akbar Irwan Irwan Is Sulistyati Isna Rahma Dini Iwantono Iwan Barnawi Jhon Armedi Pinem Jiang, Zhong Tao Jumbri, Khairulazhar Karfika Ainil Hawa Khairat Khairat Khairat Khairati Amila Khairulazhar Jumbri Khusnul Ain Khusnul Ain Komalasari Komalasari Komalasari Komalasari Komalasari Lisa Legawati Lucy Rahmawati M Mahbubur Rahman M. Fauzan Akbar M. Iwan Fermi M. Mahbubur Rahman M. Sugandi M. Yogi Riyantama Isjoni Malindo, Muhammad Eri Maria Peratenta Mawaddah Mawaddah MAYANG SARI Mayangsari Mayangsari Mazhibayev Assylzhan Meliagustin, Adilla Michael Hutapea Miran, Hussein A. Mochamad Reizal Ath Thariq Mohammednoor Altarawneh Monita Olivia Muhamamad Rizky Zuriadi Muhammad Dian Rizky Muhammad Shalahuddin Muhammad Shalahuddin Muhammad Sugandi Muhammad Zaqi Muhdarina Nabellia Nisa Mulya Novan, Andre Novia Azzahra Nurhayati Nurwijayanti Nurwulandari Saputri Ohi, Hiroshi Panca Setia Utama Paul Destin Purba Peter Peter Prawiranegara, Barata Aditya Puji Rahmawati Dwi Sukma Putra, Rahmat Ade Putri Anjani Putri Arini Putri Husni Hidayah, Putri Husni Putri, Diana Eka Rahayu, Ricky Puji Rahmadahana, Suci Rahman, M. Mahbubur Rahmansyah Rahmansyah Rahmat Kurniawan Nasution Rahmi, Sri Wahdini Raihan Daffansyah Sinaga Rani Handayani Rendy Putra Perdana Reni Yenti, Silvia Reski, M. Rifati Hanifa Rino Rinaldi Rizka Aulia Hardi, Rizka Aulia Rohadatul Aisya Rozanna Sri Irianty Russita Martani Russita Martani Rusydy Rusydy ' Salma Liska Salsabilla Diva Voadi Saputra, Adika Saputra, Fakhri Sari Rahma Yanti Sari, Esty Octiana Sarma, Deki Septian, Handika Setiani Br Manurung Silvia Reni Yenti Silvia Reni Yenti Suci Afrianti Sukoco Sukoco Sukoco Sukoco Sulistyo Saputro Sulistyo Saputro SUNARNO Sunarno Sunarno Sunarno Sunarno Suryani Dyah Astuti SYAIFUL BAHRI Syamsu Herman Syelvia Putri Utami Syelvia Putri Utami Syelvia Putri Utami Syukri Hamdani Tafrikhatul Walidah Tao Jiang, Zhong Vito Oktariandi Voadi, Salsabilla Diva Wilda Zakiah Windy Odelia Putri Wira Irawan Rossani Wisrayetti Wisrayetti Wisrayetti Wisrayetti Wisrayetti, Wisrayetti Wulandari, Revika Yang, Chun-Chen Yayan Setiawan Yelmida Azis Yogi Yolanda YOLA BERTILSYA HENDRI Yopalim Zanstra Yosi Alwinda Yosi Alwinda, Yosi Yusnimar Sahan Z Zulfansyah Zhong Tao Jiang Zikri, Ahmed Zuchra Helwani Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar Zultiniar, Zultiniar Zuqni Meldha